The following code raises an ambiguous reference to value at compile time:

import flash.display.Sprite;

public class Main extends Sprite
{
    private var _value : Number = 0.;

    public  function get value() : Number           { return _value; }
    private function set value(v : Number) : void   { _value = v; }

    public function Main() : void
    {
        value = 42.;
    }
}

I suspect some kind of bug in the compiler, though I didn't actually read the ECMA standard.

Before someone asks those questions:

• Private setters do make sense.
• The ambiguity also exists with custom namespaces (which is the problem I'm facing).